Eyre vs Lake Eyre

Eyre and Lake Eyre both are nouns.

Word	Noun	Adjective	Verb	Adverb
Eyre	Yes	No	No	No
Lake Eyre	Yes	No	No	No

As nouns, Eyre and Lake Eyre are synonyms defined as:

Eyre and Lake Eyre: a shallow salt lake in south central Australia about 35 feet below sea level; the largest lake in the country and the lowest point on the continent

Eyre (noun)	Lake Eyre (noun)
a shallow salt lake in south central Australia about 35 feet below sea level; the largest lake in the country and the lowest point on the continent	a shallow salt lake in south central Australia about 35 feet below sea level; the largest lake in the country and the lowest point on the continent